Because you want to own a fluffy red dress. And a red veil. And, oooh, red eyeshadow like Soko.
BUY IT: Make Up For Ever Artist Shadow Eyeshadow and Powder Blush, $21; sephora.com.
If this is a strictly '80s-themed party, the possibility of being asked to participate in a Madonna group photo is too damn high. Choose Cyndi instead (which, yeah, is similar but different, a distinction you can point out to the less-clever attendees).
The truly extra among us will go for her other costume in this film, which is underwear that looks like it was fashioned from a pair of sails. Go for it if you can avoid arrest, we say.
No, I'M ALEXIS.
Lots of planning, but so worth it for the photos and satisfaction you'll get from tracking down each element. Do not attempt, however, if you're not going to be extra (diligent) about it.